Last data update: 2014.03.03
R: Tools for Aquatic Sciences
marelac-package R Documentation
Tools for Aquatic Sciences
Description
R-package marelac has been designed as a tool for use by scientists
working in the MArine, Riverine, Estuarine, LAcustrine and Coastal
sciences.
It contains:
chemical and physical constants, e.g. atomic weights, gas constants.
conversion factors, e.g. from salinity to chlorinity, from mol to gram,
etc.,
utility functions, e.g. to estimate concentrations of conservative
substances as a function of salinity, ...
About the symbols used.
Here we adopt the symbolism as in McDougall et al., 2009:
S for practical (-) or absolute salinity, (g/kg)
P for absolute (total) pressure (bar)
p for sea pressure (also called gauge or applied pressure (bar), the
pressure relative to P0, one standard atmosphere (=1.01325 bar)
t for temperature in degrees C
T for absolute temperature, in degrees K; T = t + 273.15
Many of the functions are from the UNESCO 1983 paper, or from Feistel, 2008.
Note that in these papers, pressure is expressed in dbar.
Details
Package: marelac
Type: Package
Version: 2.1.4
Date: 2014-10-29
License: GNU Public License 2 or above
Author(s)
Karline Soetaert (Maintainer)
Filip Meysman
Thomas Petzoldt
with contributions from Lorenz Meire
References
For solubilities, atmospheric composition, gas exchange coefficients:
Sarmiento JL and Gruber N, 2006. Ocean Biogeochemical
Dynamics. Princeton University Press, Princeton. p 85.
For diffusion coefficients, viscosity
Boudreau BP, 1996. A method-of-lines code for carbon and nutrient
diagenesis in aquatic sediments. Computers & Geosciences 22 (5),
479-496.
For many other fundamental properties of seawater, either the UNESCO
report (1983):
Fofonoff NP and Millard RC Jr, 1983. Algorithms for computation of
fundamental properties of seawater. UNESCO technical papers in marine
science, 44, 53 pp.
http://unesdoc.unesco.org/images/0005/000598/059832EB.pdf
or the more recent report and papers:
Feistel R, 2008. A Gibbs function for seawater thermodynamics for -6 to
80 dgC and salinity up to 120 g/kg. Deep-Sea Research I, 55, 1639-1671.
McDougall TJ, Feistel R, Millero FJ, Jackett DR, Wright DG,
King BA, Marion GM, Chen C-T A and Spitzer P, 2009. Calculation
of the Thermophysical Properties of Seawater, Global Ship-based Repeat
Hydrography Manual, IOCCP Report No. 14, ICPO Publication Series no. 134.
Millero FJ, Feistel R, Wright DG, and McDougall TJ, 2008.
The composition of Standard Seawater and the definition of the
Reference-Composition Salinity Scale, Deep-Sea Res. I, 55, 50-72.
See Also
for seawater properties:
sw_adtgrad
, sw_alpha
, sw_beta
,
sw_comp
, sw_conserv
, sw_cp
,
sw_dens
,
sw_depth
, sw_enthalpy
, sw_entropy
,
sw_gibbs
, sw_kappa
,
sw_kappa_t
, sw_sfac
,
sw_svel
, sw_tfreeze
, sw_tpot
for atmospheric gasses:
gas_satconc
, gas_O2sat
,
gas_schmidt
, gas_solubility
, gas_transfer
,
atmComp
, vapor
, air_spechum
,
air_density
conversions:
convert_AStoPS
, convert_PStoAS
,
convert_RtoS
,
convert_StoCl
, convert_StoR
,
convert_p
, convert_T
datasets:
AtomicWeight
, Bathymetry
,
Constants
, Oceans
physical properties:
earth_surf
, coriolis
, viscosity
,
diffcoeff
, ssd2rad
, vertmean
,
gravity
molecular properties:
AtomicWeight
, molvol
, molweight
,
redfield
Examples
## Not run:
## show examples (see respective help pages for details)
example(Constants)
example(molvol)
## open the directory with documents
browseURL(paste(system.file(package="marelac"), "/doc", sep=""))
## End(Not run)
Results